In combats, the eight vital parts of human body are the head (neck), shoulders, elbows, hands (wrists), buttocks (waist), hips, knees and ankles, which are popularly called the Eight Doors in the wushu world.

These exercises are designed to train the eight parts simply and systematically so as to eliminate the stasis or diseases of the bones, muscles, blood vessels or nerves at the parts. At the same time, constant training of these parts will lead to their agility, flexibility and endurance to improve your self-defense skill.